请教pp中一道语法题--pp-1-86

nowday

The Milky Way is a flat sprial galaxy who contains an estimated 100 billion stars, including the Sun.

我想请问C为什么是对的？后面stars 是复数，此处为什么可以用an?

[此贴子已经被作者于2004-9-29 17:41:54编辑过]

zhoushao

看看这个贴http://forum.chasedream.com/dispbbs.asp?BoardID=58&ID=67763